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電池管理 IC
電池充電器 IC

BQ25121A

現行

具電源路徑、整合式 LDO 和降壓轉換器 2.5V 預設輸出的 300mA 線性電池充電器

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產品規格表

BQ25121A

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Number of series cells 1 Cell chemistry Li-Ion/Li-Polymer Charge current (max) (A) 0.3 Features BAT temp thermistor monitoring (JEITA profile), IC thermal regulation, Input OVP, Integrated LDO, Integrated buck converter, Power Path Vin (min) (V) 3.4 Vin (max) (V) 5.5 Absolute max Vin (max) (V) 20 Control topology Linear Battery charge voltage (min) (V) 3.6 Battery charge voltage (max) (V) 4.65 Control interface I2C Operating temperature range (°C) -40 to 85
Rating Catalog Number of series cells 1 Cell chemistry Li-Ion/Li-Polymer Charge current (max) (A) 0.3 Features BAT temp thermistor monitoring (JEITA profile), IC thermal regulation, Input OVP, Integrated LDO, Integrated buck converter, Power Path Vin (min) (V) 3.4 Vin (max) (V) 5.5 Absolute max Vin (max) (V) 20 Control topology Linear Battery charge voltage (min) (V) 3.6 Battery charge voltage (max) (V) 4.65 Control interface I2C Operating temperature range (°C) -40 to 85
DSBGA (YFP) 25 6.75999999999999792000000000000016 mm² (— mm × — mm)
  • Increases system operation time between charges
    • Configurable 300-mA buck regulator (2.5-V default)
    • 700-nA (typical) Iq with buck converter enabled (no load)
    • Configurable load switch or 100-mA LDO output ( load switch by default)
    • Up to 300-mA charge current for fast charging.
    • 0.5% Accurate battery voltage regulation (configurable from 3.6 V to 4.65 V in 10-mV steps)
    • Configurable termination current down to 500 µA
    • Simple voltage based battery monitor
    • Watchdog timer disabled
  • Highly integrated solution with small footprint
    • 2.5-mm x 2.5-mm WCSP Package and six external components for minimal solution
    • Push-button wake-up and reset with adjustable timers
    • Power path management for powering the system and charging the battery
    • Power path management enables < 50 nA Ship Mode battery quiescent current for longest shelf life
    • Battery charger operates from 3.4 V – 5.5 VIN (5.5-V OVP / 20-V tolerant)
    • Dedicated pins for input current limit, charge current, termination current, and status output
  • I2C communication control
    • Charge voltage and current
    • Termination threshold
    • Input current limit
    • VINDPM Threshold
    • Timer options
    • Load switch control
    • System output voltage adjustment
    • LDO output voltage adjustment
  • Safety-Related Certification:
    • TUV IEC 62368-1 Certification
  • Increases system operation time between charges
    • Configurable 300-mA buck regulator (2.5-V default)
    • 700-nA (typical) Iq with buck converter enabled (no load)
    • Configurable load switch or 100-mA LDO output ( load switch by default)
    • Up to 300-mA charge current for fast charging.
    • 0.5% Accurate battery voltage regulation (configurable from 3.6 V to 4.65 V in 10-mV steps)
    • Configurable termination current down to 500 µA
    • Simple voltage based battery monitor
    • Watchdog timer disabled
  • Highly integrated solution with small footprint
    • 2.5-mm x 2.5-mm WCSP Package and six external components for minimal solution
    • Push-button wake-up and reset with adjustable timers
    • Power path management for powering the system and charging the battery
    • Power path management enables < 50 nA Ship Mode battery quiescent current for longest shelf life
    • Battery charger operates from 3.4 V – 5.5 VIN (5.5-V OVP / 20-V tolerant)
    • Dedicated pins for input current limit, charge current, termination current, and status output
  • I2C communication control
    • Charge voltage and current
    • Termination threshold
    • Input current limit
    • VINDPM Threshold
    • Timer options
    • Load switch control
    • System output voltage adjustment
    • LDO output voltage adjustment
  • Safety-Related Certification:
    • TUV IEC 62368-1 Certification

The BQ25121A is a highly integrated battery charge management IC that integrates the most common functions for wearable devices: Linear charger, regulated output, load switch, manual reset with timer, and battery voltage monitor. The integrated buck converter is a high efficiency, low IQ switcher using DCS-Control™ that extends light load efficiency down to 10-µA load currents. The low quiescent current during operation and shutdown enables maximum battery life. The device supports charge currents from 5 mA to 300 mA.

The battery is charged using a standard Li-Ion charge profile with three phases: precharge, constant current and constant voltage. A voltage-based JEITA compatible battery pack thermistor monitoring input (TS) is included that monitors battery temperature and automatically changes charge parameters to prevent the battery from charging outside of its safe temperature range. The charger is optimized for 5-V USB input, with 20-V tolerance to withstand line transients. The buck converter is run from the input or battery. When in battery only mode, the device can run from a battery up to 4.65 V.

A configurable load switch allows system optimization by disconnecting infrequently used devices. The manual reset with timer allows multiple different configuration options for wake are reset optimization. A simple voltage based monitor provides battery level information to the host in 2% increments from 60% to 100% of the programmed V(BATREG).

The BQ25121A is a highly integrated battery charge management IC that integrates the most common functions for wearable devices: Linear charger, regulated output, load switch, manual reset with timer, and battery voltage monitor. The integrated buck converter is a high efficiency, low IQ switcher using DCS-Control™ that extends light load efficiency down to 10-µA load currents. The low quiescent current during operation and shutdown enables maximum battery life. The device supports charge currents from 5 mA to 300 mA.

The battery is charged using a standard Li-Ion charge profile with three phases: precharge, constant current and constant voltage. A voltage-based JEITA compatible battery pack thermistor monitoring input (TS) is included that monitors battery temperature and automatically changes charge parameters to prevent the battery from charging outside of its safe temperature range. The charger is optimized for 5-V USB input, with 20-V tolerance to withstand line transients. The buck converter is run from the input or battery. When in battery only mode, the device can run from a battery up to 4.65 V.

A configurable load switch allows system optimization by disconnecting infrequently used devices. The manual reset with timer allows multiple different configuration options for wake are reset optimization. A simple voltage based monitor provides battery level information to the host in 2% increments from 60% to 100% of the programmed V(BATREG).
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重要文件 類型 標題 格式選項 下載最新的英文版本 日期
* 資料表 BQ25121A Low IQ Highly Integrated Battery Charge Management Solution for Wearables and IoT datasheet (Rev. A) PDF | HTML 2021/1/19
應用說明 Implementing 2-V Charge Inhibition PDF | HTML 2023/5/31
應用說明 BQ2512x Frequently Asked Questions 2021/11/22

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